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Finding the Fourth Proportional to 4,986, 7,479 and 2,064.39

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Solution

The fourth proportional to 4,986, 7,479 and 2,064.39 is: 3,096.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986 : 7,479 = 2,064.39 : x
  2. Step 2: Convert to fraction form
    4,986/7,479 = 2,064.39/x
  3. Step 3: Cross multiply
    4,986x = 7,479 × 2,064.39
  4. Step 4: Simplify right side
    4,986x = 15,439,572.81
  5. Step 5: Solve for x
    x = 15,439,572.81/4,986
  6. Step 6: Final answer
    x = 3,096.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.